Method for coloring fruits and vegetables with anthraquinones and product
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United States of America Patent
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Nov 17, 1992
Grant Date -
N/A
app pub date -
Aug 23, 1991
filing date -
Aug 23, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method for permanently coloring fruits (cherries) and vegetables using carmine and other anthraquinones, using mixtures of multivalent metal ions and acid. The cherries are infused with a mixture of calcium ions, other multivalent metal ions, and carmine dye, at a pH at which the carmine is in soluble form. The cherries are then infused with an acidification solution which results in the preciptation of an insoluble carmine-metal ion complex within the cherries. Unused dye is treated and recycled.
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